EZT-570S User Manual
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5.4 Alarms
The EZT-570S provides user configurable alarms for each input. The alarms are activated when the
process value leaves the selected range. A user can configure how and when an alarm is triggered,
what action it takes and whether it clears automatically when the alarm condition is over or requires
manual reset.
For chambers equipped with a product loop, the product alarm is fixed to an absolute
high/low alarm with the silent and shutdown modes fixed to silent off and shutdown on. This
is done to insure that a basic level of precaution is taken to minimize the risk of damage to
the device under test. However, it is still the responsibility of the end user to make sure that
the alarm set points are within safe limits for the test device.
Figure 5-4 Alarm Settings
Alarm Type
Absolute:
An absolute alarm uses one or two set points to define an alarm condition. An
absolute alarm can be set for high only, low only or both (high and low).
Deviation:
A deviation alarm uses one or two set points that are defined relative to the control
set point. High and low alarm set points are calculated by adding and/or subtracting
offset values from the control set point. If the set point changes, the window defined
by the alarm set points automatically changes with it. A deviation alarm can be set
for high only, low only or both (high and low).
The deviation alarm type is not available for the optional monitor inputs. The
monitor inputs are not associated with a control set point.
Alarm Modes
Latch:
An alarm with the latch turned on will remain active after the alarm condition has
passed. It can only be deactivated by the user by pressing the Reset button on the
Alarm screen. An alarm that has latching turned off will be self-clearing and will
deactivate automatically when the alarm condition has passed.
Summary of Contents for EZT-570S
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